Slicing machine



NQV. 1, 1949 A. VAN DUYN SLIGING MACHINE Filed July 10, 1946 6 Sheets-Sheet 1 i706??? 170/?!0/V05 Vq/v Gary NW. 1, W49 A. VAN DUYN. 2,486,810

SLICING MACHINE Filed July 10, 1.946 6 Sheets-Sheet 2 A. VAN DUYN SLICING MACHINE- Nov. 1, 1949 6 Shee ts-Sheet 5 Filed July 10, 1946 6 Sheets-Sheet 5 A. VAN DUYN SLICING MACHINE Nov. 1, 1949 Filed July 10. 1946 f wwa 3 J .e f 6N jnM Nmr. L 1949 VAN DUYN 2,486,819

SLICING MACHINE Filed July 10, 1946 6 Sheets-Sheet 6 w; r g5 Patented Nov. 1, 1949 SLICING MACHINE Adrianus van Duyn, Hillegersberg, Rotterdam, Netherlands, assignor to U. S. Slicing Machine Company, La Porte, Ind., a corporation of Indiana Application July 10, 1946, Serial No. 682,707 In the Netherlands May 19, 1941 Section 1, Public Law 690, August 8, 1946 Patent expires May 19, 1961 Claims.

This invention relates in general to slicing machines, but more particularly to sharpening devices for the slicing knife, which device is mounted for movement into and out of sharpening position with respect to the knife.

Heretofore sharpening devices of this character have been mounted so that the grinding discs are arranged outside the zone of the knife, where they are exposed to dirt and filth both in the inoperative, as well as in the operative position, such as through remnants of the substance being sliced, which during the slicing, fiy off from the rotating knife, thereby reducing to a great extent, the sharpening capacity of these discs.

It is one of the objects of the present invention to overcome these difficulties and objections, and to provide an improved manner of mounting the sharpening device, so that when the grinding elements are in an inactive position, they will be disposed within the plane of the circumference of the knife, and will be completely housed within the machine frame where they will be protected from foreign elements being deposited thereupon.

A further object is to provide in an apparatus of this character improved means for mounting the sharpening elements, embodying a housing or casing which when the sharpeners are disposed or seated therein, will be completely closed. I

A still further object is to provide an improved housing for the sharpening elements when in an inoperative position, a portion of which forms a portion of the knife guard, and which structure is so arranged and constructed that when the sharpening device is in an inactive position, there will be no unsightly portions projecting beyond the knife casing, which will enhance the appearance of the machine.

A further object is to provide in a sharpening device of this character a structure wherein a portion of the grinding device which carries the grinding discs, is in the form of a plate-like element whose walls, in conjunction with the walls of the slicing machine itself, encase the grinding discs, in the inoperative position of the grinding discs.

A further object is to provide an improved structure of this character in which the element or portion of the case carrying the sharpening disc or discs, is so formed, that the disc or discs in operative condition are freely accessible to inspection or eventual interchanging of the discs.

A further object is to provide a structure of this character in which the axis of rotation of the grinding apparatus is near the circumference 2 of the knife, and the box or pocket to receive the same is so shaped that in the inactive position, the sharpening device fits with its bottom resting on top of the knife bracket.

To the attainment of these ends and the accomplishment of other new and useful objects, the invention consists in the features of novelty, in substantially the construction, combination and arrangement of the several parts, hereinafter more fully described and claimed, and shown in the accompanying drawings exemplifying this invention, and in which Figure l is a side elevation of a portion of a slicing machine, having a sharpening device, constructed in accordance with the principles of this invention applied thereto, and with the sharpening device in an inactive position, and housed within the machine frame structure.

Figure 2 is a top plan view of Figure 1.

Figure 3 is a detail sectional View on line 3-3, Figure 1.

Figure 4 is a view similar to Figure 1, showing the sharpening device in position to sharpen the knife.

Figure 5 is a detail sectional view taken on line 5--5, Figure 4.

Figure 6 is a side elevation of another form of the invention with the sharpening device in its inactive or .out of the way position with respect to the knife.

Figure '7 is an end elevation of Figure 6, with parts omitted and showing the sharpening device housed and in an inactive position.

Figure 8 is a vertical sectional view taken on line 8-8, Figure 6, partly in elevation, partly in section and with parts omitted and showing the sharpening device in an active or position to sharpen the knife.

Figure 9 is an elevation of another form of the invention showing the sharpening device housed and in an inactive position with respect to the knife.

Figure 10 is a perspective view of the structure shown in Figure 9, partly in elevation, partly broken away and partly in section, showing the sharpening device in position to sharpen the knife.

In the form of the invention shown in Figures 1 to 3, the numeral 15 designates a knife stand or bracket, the upper portion of which supports a horizontal shaft l6 of a vertical circular cutting knife I1. This stand is provided with a horizontal flange 1B, for sustaining a table plate (not shown), upon which the material to be sliced by the knife is placed.

The edge of the knife is protected by a knife guard, the left portion IQ of which is in the form of a sheath, and the right portion 20, extends only on one side of the knife.

A relatively small sheath-like segment 2|, of the knife guard, located at the top between the portions l3, and 26, is pivotally connected by a pin 22, with the portion l9, and is adapted to be raised, so that the edge of the knife at this place will be exposed. The end of the portion 20, of the knife guard adjoining the segment 2 is connected by means of a pin 23, to a fiat plate 24, which is fixed to the bracket l5, and stands with its wall facing the knife l'l. This plate is on a level with the top of the bracket I5, the same width as the latter, and in an upward direction it tapers into two diverging horns 25, and 26, and the horn 26 carries the pin 23. The pin 22 rests in an open recess 2'1, of the horn 25, so that the part I9, and the part 2|, of the knife guard may be lifted as one unit from the recess 21, and in which recess the pin 22, may be locked by means of any suitable tightening or locking nut (not shown).

The grinding apparatus, which is attached to the horn 25, so as to hinge with respect thereto, embodies grinding elements 29, 36, and also the adjusting mechanism for these elements (if provided but not shown) and which are supported by a curved plate or member 3|, which, when turned down in front of the knife l1, and within the circumference of the knife, as shown in Figure 1, forms a box, together with part of the plate 24, and with a flange 32, connected to the plate, and facing forward and within which box the grinding elements are enclosed, and which plate or member 3|, fits with its bottom on the flat top 33 of the bracket l5.

The plate 3|, is adapted to hinge upon two journals 34, 35 (see Fig. 3), disposed at right angles to each other, the former of which is carried directly by the horn 25, while the latter rests in a head 36, of the journal 34. Owing to the compaction of this joint, the width of the box enclosing the grinding elements, may also gradually decrease in a direction parallel to the axis I6, of the knife, from the end opposite the joint towards the latter. This will enhance the appearance of the machine.

By reason of the universal joint formed by the pivots 34, and 35, the grinding apparatus may be raised by means of a knob 31, connected to the plate or segment 3|, from the position of rest, or from inactive position, in which its box stands on or rests against the bracket l5, into a plane parallel to the knife l1, then subsequently swinging backwards, and then lowered from this backward position, in such a way that the grinding elements 29, 34 will occupy the desired position in engagement with the cutting edge of the knife.

A pin 38, is provided on the guard segment 2|, and is disposed in the path of movement of the plate 3|, when the latter is raised, so that the segment 2 I, will also be raised by the engagement of the plate 3! with the pin, to expose the portion of the cutting edge of the knife that is adjacent thereto.

In the form of the invention shown in Figures 4 and 5, the plate 3|a is fixed to a box 39, having a sleeve or bearing 40, that is journaled upon and is revolvable about a pin shaft 4|, and is also adapted to be moved upon and longitudinally of the pin to such an extent that the grinding elements 42, 43, when turned up from their position of rest, or inactive positions, may be moved backwards in an axial direction, so that they may be lowered into the grinding position. As shown in Figure 5, the sleeve or bearing 40, is provided with a longitudinal groove or slot 44, and a pin or projection 45, carried by the pin 4|, extends into the slot. At the ends of the slot circumferential grooves 46, 47, are provided which communicate with the slot 44, and these circumferential grooves are adapted to receive the pin or projection 45, and determine the angular distances along which the grinding elements must be lifted from the inactive position and lowered, the length of the slot 44, should be equal to that along which the sharpening elements must be removable in an axial direction.

In the form of the invention shown in Figures 6, 7 and 8, the knife 11, is rotatably supported by the shaft l6, journaled in a bracket or standard 46, the upper end of which bracket in proximity to the shaft 46, is shaped to form an open box or receptacle 49. An arm 56 connected to the bracket is provided for supporting the section 5|, of the knife guard, and an arm 52, supports the section 53, of the guard. The section 54, of the knife guard is supported by a vertically movable rod or support 55, which slides in a portion of the upright or standard 48, and also in a bearing 56, the latter having a slot or opening 57, in the wall thereof, to permit a pin or projection 53, on the rod 55, to pass through, for a purpose to be described. Connected to, and forming a part of the guard section 54, is a hood or closure 59, which is hollow, and provided with a downwardly inclining top 60, and an upright wall 6|. The sharpening elements 62, 63, are rotatably supported in suitable bearings carried by the rod or support 55, and are preferably spaced below the top 60, of the guard section '54, but are normally disposed within the confines of the walls of the hood 59. The sharpening elements may be of any suitable type and construction, well known in this art, and are provided with a handle 62a, in the form of a hand wheel which operates a cam or projection 63a, which in turn operates upon a projection or shoulder 64, for controlling the position of the sharpening elements with respect to the knife edge. If desired instead of the hand wheel 62a, an operating handle or lever 65, may be provided.

A groove or recess 66, may be provided in one of the walls of the box or receptacle 49, to receive the shaft 61, of the operating handle 62. With this form of the invention when the shapening elements 62, 63, are in an inactive position, as shown in Figures 6, and 7, they will be entirely housed within the box or receptacle 49, and the hood 59, when lowered with the knife guard section 54, will form a closure for the receptacle, whereby the sharpening elements will be entirely and completely encased and protected from foreign particles.

The receptacle and its closure 60, are so disposed that when the sharpening elements are encased thereby, they will be positioned within the plane of the cutting edge of the knife, thereby obviating projecting parts above the knife edge, which not only provides a compact arrangement, but enhances the appearance of the machine.

To move the sharpening elements from their inactive position shown in Figures 6, and '7, the knife guard section 54, is raised vertically which causes the rod or support 55, to slide in its bear- '7 ings, so that the pin or projection 55, on the rod 5 will pass through the slot 51, in the bearing 56. The section 5!, with its associated parts are then rotated, the rod or support 55, serving as a shaft, to position the cutting elements 62, 63, above the knife edge, after which the cutting elements are lowered into sharpening position, as shown in Figure 8. In this position and to support the sharpening elements the pin or projection 58, on the rod will have been moved out of alinement with the slot 51, in the bearing 56, and will rest upon the bearing. The operating handle 62a, may then be actuated if desired or necessary, to control the position, and pressure of the sharpening elements upon the knife.

In the form of the invention shown in Figures 9, and 10, the upright or standard 68, is provided with a chamber 69, opening through the top thereof, which latter is disposed a substantial distance below the top edge of the knife IT. The knife guard section 10, is supported by an arm H, carried by the upright 68, and the section 12, is supported by a similar arm 13.

The knife guard section I I, which covers the space between the proximate ends of the guard sections 10, I2, is carried by a hollow hood 15, and which latter is supported by a rod or upright 16, that is suitably mounted to slide lengthwise in bearings in the upright 68. The hood is of a size and configuration that when the guard section 14, and the sharpening element or elements 16a,

are in an inactive position, and the elements are housed in the chamber or receptacle 69, they will be within the plane of the cutting edge of the knife, and will form no projection therebeyond, as shown clearly in Figure 9. A suitable handle Tl, may be provided for raising and lowering the hood 15, and the sharpening elements.

In this form of the invention the sharpening element or elements 1611, are mounted upon a rotatable shaft 18, journaled in suitable bearings 19, carried within the hood 15, and are carried by an arm or arms 80.

A lever 8 l, is connected to the shaft for actuating it, to position the sharpening element with relation to the cutting edge of the knife. The lever is positioned outside of the hood, and a recess 82, is provided in the wall of the chamber or receptacle 69, to receive a portion of the shaft 18. When the sharpening elements are in an inactive position, and housed in the receptacle, the parts will be in the position shown in Figure 9, and there will be no portion of the housing or the sharpener that projects beyond the plane of the cutting edge of the knife. To position the sharpener for use to sharpen the knife, the hood l5, and the parts supported thereby may be raised by the handle or knob 11, until the sharpeners are above the adjacent part of the edge of the knife. The entire sharpener structure is then rotated with the support 16, until the sharpener elements and the section 14, of the knife guard are in exchanged position, as shown in Figure 10. The sharpeners are then lowered into engagement with the knife edge, and are operated by the rotation of the knife. The lever or handle 8 I, may be manipulated to control the pressure of the sharpening elements upon the knife. The sliding and rotation of the standard or support 16, as Well as maintaining the same in adjusted position, may be accomplished in the same manner, and by means of a construction and arrangement of the parts similar to the manner shown in Figures 6 to 8 of the drawings.

With all of the forms of the invention the sharpeners will be completely encased and surrounded by a housing when they are in inactive position, and will be completely concealed and protected from the deposit of foreign matter thereon, either from the knife or from other sources. Furthermore the parts are compactly arranged, thereby decreasing to a minimum, the width of the machine, and at the same time obviating the presence of parts projecting beyond the periphery of the cutting edge of the knife,

thereby enhancing the appearance of the machine.

While the preferred forms of the invention have been herein shown and described, it is to be understood that various changes may be made in the details of construction, and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention. For example, other specific structures of the knife sharpener apparatus may be employed such as those disclosed in the application of Paul E. Meyer, Serial No. 571,887 filed January 8, 1945 and in the application of Paul H. Meyer, Serial No. 630,034 filed November 21, 1945, now abandoned, both assigned to the assignee of the present invention.

What is claimed as new is:

l. A slicing machine embodying a rotatable knife, a sharpening device for the knife, a support for the sharpening device, means mounting said support for mounting said sharpening device to be positioned to engage the edge of the knife and to be moved away from the said edge into an inactive position, and auxiliary housing means adapted to cooperate with said support for com pletely housing said sharpening device when in its inactive position.

2. A slicing machine embodying a rotatable knife, a sharpening device for the knife, 2. support for the sharpening device, means mounting said support for mounting said sharpening device to be positioned to engage the edge of the knife and to be moved away from said edge into an inactive position within the circumference of the knife, and auxiliary housing means adapted to cooperate with said support for completely housing said sharpening device when in its inactive position.

3. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a support for the sharpening device, means mounting the support for movement to position the sharpening device to contact the knife and for movement into an inactive position, the said support being of a configuration, that the walls thereof will cooperate with a portion of said frame to encase the sharpening device when the latter is in an inoperative position with respect to the knife.

4. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a support for the sharpening device, means mounting the support for pivotal movement in planes intersecting each other to position the sharpening device to contact the knife and for movement into an inactive position, the said support being of a configuration, that the walls thereof will cooperate with a portion of said frame, to encase the sharpening device when the latter is in an inoperative position with respect to the knife.

5. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a support for the sharpening device, means mounting the support for movement to position the sharpening device to contact the knife and for movement into an inactive position, the said support being of a configuration, that the walls thereof will cooperate with a portion of said frame, to form an entirely closed casing in which the sharpening device is disposed when in an inactive positive, the top of said casing being disposed at substantially the top portion of the knife edge.

6. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a support for the sharpening device, means mounting the support for movement to position the sharpening device to contact the knife and for movement into an inactive position, the said support being of a configuration, that the walls thereof will cooperate with a portion of said frame, to encase the sharpening device when the latter is in an inoperative position with respect to the knife, the said support for the sharpening device being also shaped to permit free access to the sharpening device when in the operative position.

7. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a sectional guard for the knife, means mounting one of the sections for pivotal movement away from the knife edge, a support for the sharpening device, means mounting the support for movement to position the sharpening device to contact the edge of the knife and also for movement into an inactive position Within the circumference of the knife, and means whereby when the sharpening device is being moved into an active position, the said pivotally mounted guard section will be swung about its pivot and away from the knife edge.

8. A slicing machine embodying a standard, a circular knife rotatably supported by the standard and projecting above the top of the standard, an open receptacle formed at the top of the standard, a sharpening device for the knife, a support for the sharpening device, and means mounting said support for movement in a plane parallel with the plane of the knife and also in a plane transverse to the plane of the knife, the said sharpening device being adapted to be positioned within said receptacle when moved into an inactive position, the said support forming a closure for the receptacle, said closure when in closing position, being disposed within the circumference of the knife.

9. A slicing machine embodying a rotatable circular knife, a sectional guard for the knife, means pivotally mounting two of said sections together, a sharpening device for the knife, a support for the sharpening device, means mounting the support for movement to position the sharpening device to engage the knife and for movement away from the knife edge and into a position within the circumference of the knife, means responsive to the movement of the support to the position that the sharpening device will engage the knife, operating to move one of the said guard sections away from the knife, and means mounting the said pivotally connected guard sections for removal as a unit from the machine.

10. A slicing machine embodying a frame, a rotatable circular knife, a sharpening device for the knife, a sectional guard for the knife, a support for the sharpening device, means mounting the support for movement in different intersecting planes to position the sharpening device to contact the edge of the knife and also for movement into an inactive position within the circumference of the knife, means for movably mounting one of the sections of the knife guard, and means on said one of the sections cooperating with said sharpening device to move said one of the sections to expose the knife edge when the sharp- :ning device is being moved into an active posiion.

ADRIANUS vim DUYN.

REFERENCES CITED The following references are of record in the file of this patent: 1

UNITED STATES PATENTS Number Name Date 1,939,740 Van Berkel Dec. 19, 1933 2,052,366 Ahrndt Aug. 25, 1936 2,141,055 Van Berkel Dec. 20, 1938 FOREIGN PATENTS Number Country Date 54,942 Netherlands July 15, 1943 

